Cita APA (7a ed.)

UNCTAD. (1990). Review of maritime transport 1989. UNCTAD.

Cita Chicago Style (17a ed.)

UNCTAD. Review of Maritime Transport 1989. Nueva York: UNCTAD, 1990.

Cita MLA (9a ed.)

UNCTAD. Review of Maritime Transport 1989. UNCTAD, 1990.